Apparatus for feeding powdered coal



' W. J. STOOP APPARATUSFOR FEEDING POWDERED COAL Filed Dec. 5, 1923 2 Sheets-Sheet 1 J/WE/VraR Nov. 10 1925- W. J. STOOP APPARATUS FOR FEEDING POWDERED GOAL 2 Sheets-Sheet 2 Filed Dec. 5, 1923 y a /W Patented Nov. 10, 1925 l V wrnnrnm J. sTooP, or mHnEnrNG; JwEs r vrnernrn,

enitener s iron v sewerage LQQAL- ar -W s fi D s-sees To all whom it may concern: .c p

.Be it known that 1, WILLIAM J. S'roor a citizen .of'the United States of America and resident of'VVhee ling', county oflohiio,

and State v,oi" W est Virgihia,- have invented a n new and uset i I p ovem n s. in Apparatus for Feeding Powdered Goal, of Whiclrthe f ollowing'i's a specification; l

This invention relat eslbroadly to powd ere d coal installations for furnQGS} and m r p ifi a y to f ed ngland dis ributing apparatus for vpoiyde'red fuel. i i The primary object of the invention to provide, in association With a furnace firex (f m l s; ail Laep r s ii by powdered coal supplied at ow velocity to e fir r pxo-f boi Or t a ffi i i i' and is" effe tiv ly dist te o relamay Wide area for-facilitatingcombustion.

A further object is to rprov uide anfappaet s o t arac er d siiribed em odyin t ll ble m a w e he t if s eply of a r or m xing with the g -l l' s aut maticallyregulated. i

In describ ng'the inyentionindeta il, refi er n i here n ha to heaccdmnen n drawings, in which Fig i$ P n ie-W d h? ver e a r iq 9f h e tribvt e eed n ei g b qks r;

' g ns 2 1s ses on ke s stantially Q 1 e :25 Figshowing he magne p l e t the T' shle th fi e-he sf boiler; 1 Y V '1 F u 3 s i o the 'osln strihut r h ed partlyin fironteleyatioi and partly in sec i illus rat g t 'epnl ti t 'th ir-sh 1 headyand o he fir rber th latte ein sh wn n ns rs s c ie i I i Y a Figures is an e la ged deta s etiee at the arch and the nozzles of the ,cl istrilout o r Figure 5 is an enlarged side elevation-oi the shutter box.

Referr ng to drawi g 1 indicates generally the crown of a furnace or the arch of the fire-box of a Water tube boiler designed to employ powdered coal" as fuel. Said Wall, hereinafter termed an arch, as shown in-Figs. 3 and 4, is constructed of tile or blocks 1 of a suitable refractory material supported by parallel longitudinally extending I-beams '2. V Located in transversely alined relation over the arch is plurality of distributor nozzles 3, preferably made of cast iron, to and thereof the mouth portion of 5, seeI MW through which the powdered bo -1 liyerd, aid nozzle being .of in e ted frusto pyramid al form and having their smaller ends seated in correspondingly Shaped seatsl i formed at the "upper endsf of ertically disposed slot-like openings provideclin an underlying rowwof thearch; v

- blocks 1, said openings constitutinglpas duced in'.,the lfir-e-box. ,j Said nozzles sage u p rt d by t e b 5 ea h a y-mg beamsf sh n i g Bas d Mounted upon the vupper end of zles 3 isothelowenend of n etal c asing 6 wh tan la iebe zanta sent-W f r embra n t ep e ip r i n the alined cz'zll 'and wh is subst nt ally o i yerfied if lS oip yraihidal fo rinii ease.

ls '6 "h tta hed "imam hmugh th upp s tionef t e: f

sp ader {7 e" wh h eeelfi e ht the new (n h nl sg up ied t -a tac ed ne Pin prea h sas p i ymatly iee s e fill m hat h r p a d he ageeegate .41 ha e are Q1 th (no le isaerset h that o said pipe; .zson equ Wall 69 1s inc ne d w- W as shown in Fig;2. Surmounting said casing nd hearing the rea wel hereof the sam v terme by ani p a d ext ns on o t e'lat r, s; been ke enclo ure 9; d fining en inlet passa e: r ai mhi is admi ed" er; mix g.

plane withthe r ar wall sen or we? as uel-inthe lowerepart of said ing prior to the delivery ofthelatter to'the fire-box. ters lOare mounted over the top of said enclosure 9 for controlling the admission of air. As'hereinshown, said shutters are fixed upon rods or shaftsfll which are rotatably mounted on the upper part of a cap 12 carried on the top of the enclosure 9. Arms 13 fixed on adjacent ends of said shafts l1 normally occupy depending positions in which said shutters are maincerdlylo-an i t di wardly from the spreade'rflgto the nozzles;

a -the n his trent? One or more damper-like shut: I

tained'in closing relation to the open top of said cap 12, as shown in Fig. 3. A horizontally disposed bar or link 14 has pivoted connection with the outer ends offsaid arms,

and is adapted to be suitably connected, as by a cable 15, to an automatic furnacedamper controlling device (not shown) which may be of any of the various commercial pressure-regulated types, whereby said dampers are elevated and lowered in accordance with the demands of the furnace.

Fixed within the casing 6 and" extending in a downwardly and forwardly inclined direction from the lower end of the front wall of the enclosure 9 to a level somewhat above thevdischarge end of said casing is a baffle plate 16 which serves to prevent the admitted draughts of air from creating a back pressure which might interfere with the delivery of the powdered coal. The lower edge of said baffle is suitably spaced from the rear wall 6 of the casing, being carried by'cleat-like straps 17 mounted on said wall, as shown in Figs. 1 and. 2.

Superposed upon terminal flanges 3 7, formed on the adjacent sides of the upper ends of the nozzles 3 are upright dividers 18, of pyramidal form, which serve to split'up the coal delivered downward within the casing 6 and to make a theoretically equal 7 I, division'between adjacent nozzles.

' The casing 6, spreader 7, and nozzles 3 constitute a distributor head which is particularly effective for accomplishing a proper distributionof powdered coal throughout boiler fire boxes and the combustion chambers of furnaces. Due to the alined feed passages therein of a'plurality of nozzles of inverted frusto-pyramidal form in communication with said passages,

dividers located in intermediate overlying relation to said nozzles, a casing having its lower end embracing the upper ends of said nozzles, a fuel supply, pipe opening into said casing, controllable means for introducing air through the top of the casing, and baffle means whereby the admitted air is delivered for mixing with the coal at a point intermediate the level of said supply opening and, the level of said dividers.

2. In apparatus for feeding powdered coal to furnaces and boiler. fire-boxes, the combination with an overlying arch having alined feed passages therein, of a plurality of nozzles of frustro-pyramidal form in communication with said passages, dividers located in intermediate overlying relation to said nozzles, a casing having its lower end communicating with the upper ends of said nozzles, a fuel supply pipe opening laterally into the upper end of said casing, controllable means for introducing air vertically into said casing, and a transversely disposed baffle depending within said casing between the fuel-supply opening and the opposite casingwall for directing admitted air past said opening and delivering same in mixed relation to the fuel at a level below said opening. v V

3. In apparatus for feeding powdered coal to furnaces, the combination with a furnace arch having a feed passage therein, of a distributor head arranged. for feeding coal through said passage, said distributor head comprising a hopper-like casingrhaving its delivery end disposed in open communication with said passage, afuel supply pipe opening into said casing at a level re. mote from said delivery end, controllable means for introducing air at atmospheric pressure into said casing through thetop of the latter, and a baflie arranged trans versely between the fuel supply pipe opening and the'opposite wall of the casing and depending to alevel adjacent to said de livery end of the casing, said baffle serving to prevent back pressure of air in said fuel supply pipeby delivering the air for mix ing with the fuel at a level adjacent to said delivery end.

ture.

' WILLIAM J. STQQPL:

In testimony whereof, afiix signa 

